calc_ratio_dist: calc_ratio_distance

In limnoliver/pah: Common Analyses for Polycyclic Aromatic Hydrocarbons (PAH) Data

Description

Calculates the Euclidean distances between samples and sources from the double ratio plots.

Usage

calc_ratio_dist(ratio_dat)

Arguments

ratio_dat

The output of calc_ratios, which includes the four ratios of interest for both sources and samples.

Value

A list of three data frames, which includes 1) distances for each double ratio plot, source, and sample combination, along with the ranking of each source by sample (1 = closest) for each double ratio plot ("raw"), 2) distances summarized by source, which contains the mean distance, rank, and the number of top ranks calculated for each source and double ratio plot combination ("source"), 3) distances summarized by sample, which reports the top-ranked source for each sample and double ratio combination ("sample"). Abbreviations for the ratios include: Anth_AnthPhen or AAP (ratio of anthracene to anthracene plus phenanthrene), Flua_FluaPyr or FFP (ratio of fluoranthene to fluoranthene plus pyrene), Baa_BaaCh or BBC (ratio of benzo(a)anthracene to benzo(a)anthracene plus chrysene), Indpy_IndpyBghip or IIB (ratio of indeno(1,2,3-cd)pyrene to indeno(1,2,3-cd)pyrene plus benzo(g,h,i)perylene). Each double ratio comparison is distinguished by the shorter of the abbreviations separated by an underscore (e.g., FFP_AAP is one double ratio comparison).

limnoliver/pah documentation built on April 30, 2020, 2:45 p.m.